US3859920A - Method of making a hectographic master - Google Patents

Method of making a hectographic master Download PDF

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Publication number
US3859920A
US3859920A US346701A US34670173A US3859920A US 3859920 A US3859920 A US 3859920A US 346701 A US346701 A US 346701A US 34670173 A US34670173 A US 34670173A US 3859920 A US3859920 A US 3859920A
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US
United States
Prior art keywords
indicia
carrier
web
paper web
obverse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US346701A
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English (en)
Inventor
Gerhard Ritzerfeld
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Individual
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Individual
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Filing date
Publication date
Priority claimed from DE19722218267 external-priority patent/DE2218267C3/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3859920A publication Critical patent/US3859920A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used

Definitions

  • a carrier web having a thermomelting color layer is similarly moved past the operating station at which latter is brought into contact with the reverse side of the paper, whose obverse side is sensitized so as to change color when subjected to heat.
  • the obverse side is thereupon contacted at the station with heated instrumentalities which produce local color changes in form of indicia, and the heat passing through the paper causes corresponding local portions of the color layer to melt and adhere to the reverse side of the paper which faces the carrier web, thus producing on this side of the paper mirrorreversed replicas of the indicia, which replicas can subsequently be used for hectographic printing.
  • the present invention relates to masters for hectographic printing, and more particularly to an improved master of this type and to a method of making the same.
  • an object of the present invention to provide a method of recording indicia in the aforementioned manner on a carrier which at the same time constitutes a master that can be used for subsequent hectographic printing of the thus-recorded indicia.
  • An additional object of the invention is to provide such a method which eliminates all intermediate steps required for reproducing the recorded indicia, so that the latter can be produced directly from the carrier on which they have been recorded and which also serves as the aforementioned master.
  • Another object of the invention is to provide an improved master for hectographic printing.
  • one feature of the invention resides in a method wherein a paper web and a carrier having a thermo-melting color layer thereon are advanced in incremental steps past an operating station.
  • the color layer is contacted with one side of the paper web at this operating station, and indicia are thermally produced in the paper web at another side thereof while to the one side there are simultaneously adhered portions of the color layer which form on this one side mirror-reversed replicas of the indicia.
  • mirror-reversed replicas of the indicia can be used at any desired time either immediately after their formation or after expiration of a greater or lesser period of time to hectographically print copies of the information recorded on the carrier/master in form of the aforementioned indicia.
  • FIG. 1 is a somewhat diagrammatic side view of an arrangement for carrying out the novel method.
  • FIG. 2 is a fragmentary partly sectioned detail view of FIG. 1, on an enlarged scale.
  • a recording head used for such purposes usually is provided with a plurality of electrodes in form of wires or small rods which are arranged in form of a grid or raster. The free ends of these rods contact the thermally sensitive carrier and, when a particular rod is electrically energized, its free end in contact with the carrier will cause the latter to become discolored locally, namely forming a dot.
  • the rods are usually arranged in form of a grid having seven lines of five rods each, so tht such a head may have 35 rods and can correspondingly produce 35 dots. Of course, the number may be greater or lesser.
  • To produce a particular indicium, such as a letter, numeral or the like selected ones of the rods are heated so as to produce a number of dots which together form the outline of the indicium in question.
  • the selection of the rods to be heated is carried out bya signal generator which can be controlled from a keyboard or from an automatic programming device.
  • the indicia thus formed are of course legible but cannot be conveniently reproduced, for the reasons set forth earlier.
  • FIGS. 1 and 2 show an arrangement for carrying out the novel method, that is for producing a hectographic master at.
  • Reference numeral 1 in the drawing designates the finished master for hectographic printing.
  • Reference numeral 2 designates a thermal activatorhaving a recording head 2a of the type discussed earlier and well known to the art. Selection of the particular rods which are to be energized in the head 2a to produce a given indicium is controlled by a non-illustrated coding matrix in a data processing system, that is via a pre-selected program. This is too well known to require detailed discussion and does not in itself form a part of the present invention.
  • the head 2a may have the aforementioned raster arrangement of seven lines of rods, each line having five of the rods so that the head can produce 35 dots. It is located, or rather the free ends of the rods are located, immediately adjacent the heat-sensitive paper web la on which those of the rods which are activated produce respective dots the totality of which forms an indicium 3.
  • the paper web la is provided with a heat-sensitive layer 112 which will change color where it is subjected to the heat produced at the free ends of the respective rods, thus forming the dots.
  • the paper web not only be provided with a recording of the respective indicia but that it at the same time be constituted as a master capable of melting, that is, when subjected to localized heat, local portions of the substance melt and are transferred to the web 1a.
  • a master capable of melting that is, when subjected to localized heat, local portions of the substance melt and are transferred to the web 1a.
  • Such substances are well known, and'the web 4 may for instance be produced in accordance with the disclosure in my prior US. Pat. No. 3,096,711.
  • the web 4 is withdrawn from a supply roll 5 and taken up on a take-up roll 7. Intermediate these rolls is located a pressure roller 6 which engages the web directly opposite the recording head 2a.
  • the carrier la which may for instance be provided with leporellofolds, has the aforementioned heat-sensitive layer lb. It may be stored in a container 8 from which it is made to pass between the web 4 (so that the latter is located between the paper web la and the roller 6) and a pressure roller 9 so that its side 1a" comes in contact with the coloring substance layer 4b of the web 4.
  • the carrier 1a and the web 4 are moved in incremental steps past the head 2a. This means, of course, that they must be moved past the head at identical speeds, for which purpose an electromotor 10 is provided which is controlled by the same programming system that also controls the activation of the various rods in the head 24a.
  • the motor 10 drives the roller 6, a transport roller 16 for the carrier la and subsequently the master 1 which is deposited in a receptacle 17, and the roller 7, for which purpose a timing belt 11 and timing gears 12, l3, l4 and 15 are provided which cooperate with the belt 11.
  • a transport roller 18 cooperates with the roller 16, and rollers 19 and 20 are provided which serve as guide rollers for the carrier 1a and subsequently the master 1.
  • the 2 shows on an enlarged scale how the indicia 3 are formed on the side la of the carrier la by the head 2, and how simultaneously the mirror-reversed replicas ofthe indicia 3 are formed at the reverse side la" of the carrier la.
  • the heat which forms the replicas 3 at the side la passes through the carrier 1a and locally melts the coloring substance of the layer 4b which is in contact with the side la", so that the melted portions adhere to the side la" in registry with the indicia 3, forming mirror-reversed replicas 4b on the side la". It is these replicas which, after the now completed master 1 is separated from the web 4, permit direct hectographic printing of the recorded information.
  • the head 2a may be made to advance axially along the roller 6 to produce individual indicia 3 (the socalled bit-serial operation"), or it maybe stationary and extend over the entire axial length of the roller 6 and produce entire lines of indicia simultaneously (the so-called bit-parallel operation). Both of these approaches are already known from the art.
  • the carrier la can be in form of an elongated web, or in form oflindividual sheets, and the same is evidently also true of the web 4.
  • a method of making a master for a hectographic copying process comprising the steps of simultaneously advancing a non-transparent paper web having an obverse and a reverse side and provided with a thermally sensitive layer on its obverse side, together with a carrier web having a thermally transferably color layer, in incremental steps past an operating station; contacting said color layer with said reverse side of said paper web at said operating station; and applying heat to selected portions of said obverse side of said paper web at said operating stationso as to-produce trueimage indicia on said obverse side by localized discoloration of said thermally sensitive layer and to simultaneously transfer to said reverse side portions of said color layer corresponding in shape to said indicia, said portions of said color layer adhering to said reverse side and forming thereon mirror-image replicas of said indicia which are subsequently transferable to copy sheets in a hectographic copying process as true images of said indicia.
  • step of applying heat comprises contacting said ,paper web at said obverse side with heated indicia-forming instrumentalities.
  • step of applying heat comprises contacting said obverse side of said paper web with heated indicia-forming instrumentalities, and contacting a side of said carrier web which faces away from said paper web with a roller located opposite said instrumentalities.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Printing Methods (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Electronic Switches (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
US346701A 1972-04-12 1973-03-30 Method of making a hectographic master Expired - Lifetime US3859920A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722218267 DE2218267C3 (de) 1972-04-12 Verfahren zur Herstellung eines hektographischen Umdruckoriginals auf thermischem Wege

Publications (1)

Publication Number Publication Date
US3859920A true US3859920A (en) 1975-01-14

Family

ID=5842045

Family Applications (1)

Application Number Title Priority Date Filing Date
US346701A Expired - Lifetime US3859920A (en) 1972-04-12 1973-03-30 Method of making a hectographic master

Country Status (8)

Country Link
US (1) US3859920A (xx)
BE (1) BE796345A (xx)
CH (1) CH551288A (xx)
ES (1) ES413590A1 (xx)
FR (1) FR2180304A5 (xx)
GB (1) GB1359800A (xx)
NL (1) NL7304327A (xx)
SE (1) SE385817B (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909151A (en) * 1986-11-10 1990-03-20 Matsushita Electric Industrial Co., Ltd. Method of forming an ink image and printing the formed image
US4930417A (en) * 1988-01-29 1990-06-05 Oki Electric Industry Co., Ltd. Printer for simultaneously forming planographic printing surfaces and printing ink images
US4958564A (en) * 1988-10-08 1990-09-25 Man Roland Druckmaschine Ag Method and system for preparing a planographic printing form
US5072671A (en) * 1988-11-09 1991-12-17 Man Roland Druckmaschinen Ag System and method to apply a printing image on a printing machine cylinder in accordance with electronically furnished image information

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389854A (en) * 1942-09-25 1945-11-27 Ditto Inc Sheet handling method
US2501495A (en) * 1944-05-05 1950-03-21 Ibm Copying process
US2844094A (en) * 1955-01-05 1958-07-22 Addressograph Multigraph Printing machine and method for transferring ink by heat and pressure
US3018723A (en) * 1959-09-25 1962-01-30 Addressograph Multigraph Printing machines
US3596055A (en) * 1969-05-08 1971-07-27 Texas Instruments Inc Method and apparatus for producing displays utilizing an electronic display system
US3669019A (en) * 1969-11-03 1972-06-13 Eaton Allen Corp Dual purpose hectographic master unit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389854A (en) * 1942-09-25 1945-11-27 Ditto Inc Sheet handling method
US2501495A (en) * 1944-05-05 1950-03-21 Ibm Copying process
US2844094A (en) * 1955-01-05 1958-07-22 Addressograph Multigraph Printing machine and method for transferring ink by heat and pressure
US3018723A (en) * 1959-09-25 1962-01-30 Addressograph Multigraph Printing machines
US3596055A (en) * 1969-05-08 1971-07-27 Texas Instruments Inc Method and apparatus for producing displays utilizing an electronic display system
US3669019A (en) * 1969-11-03 1972-06-13 Eaton Allen Corp Dual purpose hectographic master unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909151A (en) * 1986-11-10 1990-03-20 Matsushita Electric Industrial Co., Ltd. Method of forming an ink image and printing the formed image
US4930417A (en) * 1988-01-29 1990-06-05 Oki Electric Industry Co., Ltd. Printer for simultaneously forming planographic printing surfaces and printing ink images
US4958564A (en) * 1988-10-08 1990-09-25 Man Roland Druckmaschine Ag Method and system for preparing a planographic printing form
US5072671A (en) * 1988-11-09 1991-12-17 Man Roland Druckmaschinen Ag System and method to apply a printing image on a printing machine cylinder in accordance with electronically furnished image information

Also Published As

Publication number Publication date
ES413590A1 (es) 1976-01-16
BE796345A (fr) 1973-07-02
CH551288A (de) 1974-07-15
SE385817B (sv) 1976-07-26
DE2218267B2 (de) 1976-02-26
DE2218267A1 (de) 1973-10-31
FR2180304A5 (xx) 1973-11-23
NL7304327A (xx) 1973-10-16
GB1359800A (en) 1974-07-10

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